Module Name: src
Committed By: thorpej
Date: Fri Dec 22 19:53:47 UTC 2023
Modified Files:
src/sys/arch/sun2/sun2: pmap.c
src/sys/arch/sun3/sun3: pmap.c
Log Message:
pv_link(): Seed pv_flags for the page with PG_MOD and PG_REF if
the caller pre-set those bits in the PTE (which pmap_enter() does,
based on hints from uvm_fault()), avoiding the slow path in
pmap_is_{referenced,modified}().
To generate a diff of this commit:
cvs rdiff -u -r1.50 -r1.51 src/sys/arch/sun2/sun2/pmap.c
cvs rdiff -u -r1.175 -r1.176 src/sys/arch/sun3/sun3/pmap.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/arch/sun2/sun2/pmap.c
diff -u src/sys/arch/sun2/sun2/pmap.c:1.50 src/sys/arch/sun2/sun2/pmap.c:1.51
--- src/sys/arch/sun2/sun2/pmap.c:1.50 Fri Jun 2 08:51:47 2023
+++ src/sys/arch/sun2/sun2/pmap.c Fri Dec 22 19:53:47 2023
@@ -1,4 +1,4 @@
-/* $NetBSD: pmap.c,v 1.50 2023/06/02 08:51:47 andvar Exp $ */
+/* $NetBSD: pmap.c,v 1.51 2023/12/22 19:53:47 thorpej Exp $ */
/*-
* Copyright (c) 1996 The NetBSD Foundation, Inc.
@@ -82,7 +82,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.50 2023/06/02 08:51:47 andvar Exp $");
+__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.51 2023/12/22 19:53:47 thorpej Exp $");
#include "opt_ddb.h"
#include "opt_pmap_debug.h"
@@ -1349,15 +1349,15 @@ pv_link(pmap_t pmap, int pte, vaddr_t va
panic("pv_link: duplicate entry for PA=0x%lx", pa);
}
#endif
-#ifdef HAVECACHE
+ /* Only the non-cached bit is of interest here. */
+ int flags = (pte & (PG_NC | PG_MODREF)) >> PV_SHIFT;
+ *pv_flags |= flags;
+
+#ifdef HAVECACHE
/*
* Does this new mapping cause VAC alias problems?
*/
- /* Only the non-cached bit is of interest here. */
- int flags = (pte & PG_NC) ? PV_NC : 0;
-
- *pv_flags |= flags;
if ((*pv_flags & PV_NC) == 0) {
for (pv = *head; pv != NULL; pv = pv->pv_next) {
if (BADALIAS(va, pv->pv_va)) {
Index: src/sys/arch/sun3/sun3/pmap.c
diff -u src/sys/arch/sun3/sun3/pmap.c:1.175 src/sys/arch/sun3/sun3/pmap.c:1.176
--- src/sys/arch/sun3/sun3/pmap.c:1.175 Sun Dec 17 13:28:59 2023
+++ src/sys/arch/sun3/sun3/pmap.c Fri Dec 22 19:53:47 2023
@@ -1,4 +1,4 @@
-/* $NetBSD: pmap.c,v 1.175 2023/12/17 13:28:59 andvar Exp $ */
+/* $NetBSD: pmap.c,v 1.176 2023/12/22 19:53:47 thorpej Exp $ */
/*-
* Copyright (c) 1996 The NetBSD Foundation, Inc.
@@ -80,7 +80,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.175 2023/12/17 13:28:59 andvar Exp $");
+__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.176 2023/12/22 19:53:47 thorpej Exp $");
#include "opt_ddb.h"
#include "opt_pmap_debug.h"
@@ -1356,15 +1356,14 @@ pv_link(pmap_t pmap, int pte, vaddr_t va
panic("pv_link: duplicate entry for PA=0x%lx", pa);
}
#endif
-#ifdef HAVECACHE
+ flags = (pte & (PG_NC | PG_MODREF)) >> PV_SHIFT;
+ *pv_flags |= flags;
+
+#ifdef HAVECACHE
/*
* Does this new mapping cause VAC alias problems?
*/
-
- /* Only the non-cached bit is of interest here. */
- flags = (pte & PG_NC) ? PV_NC : 0;
- *pv_flags |= flags;
if ((*pv_flags & PV_NC) == 0) {
for (pv = *head; pv != NULL; pv = pv->pv_next) {
if (BADALIAS(va, pv->pv_va)) {
